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wa死了？

Posted by wskiwwwx at 2009-08-23 16:29:38 on Problem 3740 
4 4
0 1 1 0
1 0 0 0
0 0 1 1
0 0 0 1
It is impossible
3 3
1 1 1
1 1 1
1 1 1
Yes, I found it
4 4
0 1 1 0
1 0 0 0
0 0 1 1
0 0 0 1
It is impossible
这些测试数据结果对吗？
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